When utilizing the Jungle Disk network drive mapped as a WebDAV share, your performance may be degraded if the "Automatically detect settings" setting within Internet Explorer is enabled.
Within Internet Explorer, go to Tools -> Internet Options -> Connections [Tab] -> Lan Settings -> Uncheck "Automatically detect settings".
Note: This only affects Windows based computers.
Reference: http://social.technet.microsoft.com/Forums/en-US/w7itpronetworking/thread/600a9825-0ba1-4c15-93f6-fc99c64b4930